There's something happening in my body right now and I don't know what it is

I think I'm dissociating but I've never done it before, first I was numb and it felt good at first because I'm going through it mentally right now, I couldn't move, it was like I was floating. When I looked in the mirror I didn't recognize the person looking back. It looked like a scared kid. I couldn't feel the cold water on my face, it's like autopilot. Now it's being split with almost like panic attacks, I'll suddenly cry and not be able to catch my breath, then back to nothing. I don't know what to do, I don't have anyone else to tell